* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    word-wrap: break-word;
    font-family: '微软雅黑', sans-serif;
}

body {
    /* background: #000;
    min-height: 200vh; */
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: 0.6s;
    padding: 40px 100px;
    z-index: 100;
}

header.sticky {
    padding: 5px 100px;
    background: #fff;
}

header .logo {
    position: relative;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    font-size: 2em;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: 0;
}

header ul {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

header ul li {
    position: relative;
    list-style: none;


}

header ul li a {
    position: relative;
    margin: 0 15px;
    text-decoration: none;
    color: #fff;
    letter-spacing: 2px;
    font-weight: 500px;
    transition: 0.5s;
    display: block;
    height: inherit;
}
header ul li a:hover{
    color: #ee3f4d;
}
header.sticky .logo,
header.sticky ul li a {
    color: #000;
}
header.sticky ul li a:hover{
    color: #ee3f4d;

}